🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

google/cloud/firestore_v1/types/query.py

@@ -541,6 +541,21 @@ class FindNearest(proto.Message):
                 Required. The number of nearest neighbors to
                 return. Must be a positive integer of no more
                 than 1000.
+            distance_result_field (str):
+                Optional. Optional name of the field to output the result of
+                the vector distance calculation. Must conform to [document
+                field name][google.firestore.v1.Document.fields]
+                limitations.
+            distance_threshold (google.protobuf.wrappers_pb2.DoubleValue):
+                Optional. Option to specify a threshold for which no less
+                similar documents will be returned. The behavior of the
+                specified ``distance_measure`` will affect the meaning of
+                the distance threshold. Since DOT_PRODUCT distances increase
+                when the vectors are more similar, the comparison is
+                inverted.
+
+                For EUCLIDEAN, COSINE: WHERE distance <= distance_threshold
+                For DOT_PRODUCT: WHERE distance >= distance_threshold
         """
 
         class DistanceMeasure(proto.Enum):
@@ -597,6 +612,15 @@ class DistanceMeasure(proto.Enum):
             number=4,
             message=wrappers_pb2.Int32Value,
         )
+        distance_result_field: str = proto.Field(
+            proto.STRING,
+            number=5,
+        )
+        distance_threshold: wrappers_pb2.DoubleValue = proto.Field(
+            proto.MESSAGE,
+            number=6,
+            message=wrappers_pb2.DoubleValue,
+        )
 
     select: Projection = proto.Field(
         proto.MESSAGE,